| back and forth |
moving backward then forward, or forward then backward, often many times without stopping. |
| back out of |
to fail to do something that was agreed upon. |
| back road |
a road that avoids traffic and high speed travel. It is often a small, country road that goes through areas with few houses and buildings. |
| back seat |
the seat or seating area behind other seats, especially in a car or other vehicle. |
| behind one's back |
when one is not present; secretly. |
| bounce back |
to return to a normal condition quickly or completely. |
| fall back on |
to have another choice if something does not work out; resort to. |
| go back on |
to take back. |
| pat on the back2 |
(informal) to show praise or thanks by words or actions. |
| pay back |
to return what is owed or borrowed; repay. |
| take back |
to retrieve something given to another person. [2 definitions] |
| talk back |
to answer in a rude manner. |
| turn one's back on |
to pay no attention to the needs of; abandon. |